Hoist-driving gear



Aug. 17 1926. 1,596,269

F. A. JIMERsoN E'r Al.

HOI ST DRIVING GEAR l Filed July 6I 1925 i 2 Sheets-Sheet 1 lIl Aug.17,1926. 1,596,269

- ,F.A. JIMERSON El' AL I HoIs'r DRIVING GEAR Filed/uly 6 1925 2Sheets-Sheet. 2

THEIR A oRNEY Patented ng. 17, 1925.

essaies @unirse 'Starts sNiosFi-'cs.

"FRANCS A. v/.`lf-'.|Il/1 TIRSCJN,#OF -ATHENS, PENNSYLVANIA, AND CAIDH.- PECK, OF WA- VBRIY,`NE`l/V 'YO-RK, ASSIGNORS TO INGERSOLL-RANDCOMPANY, 0F JERSEYCITY, NEW JERSEY, A'GORPORATION VOF NEW JERSEY. y

yHoIsfr-iiniviivs GEAR Appiicaaon'aiea Ju1y-e,.1925. seriaiiro. 41,590.

This invention relates tovlioists,but more particularly to a fluidactuated hoist capa ble oic comparatively heavy duty in which the motorshaft is geared to theV drinn by reduction gearing.

The objects of the invention areto secure a simple, strong, unitaryhoist construction including compact and durable reduction Y i/,eariiigcapable ot/being subjected to considerable rstrain Without derangement yor `breakage- The invention ijs sho'vvnin one of its preferred tori'.sin theaccompanying'drawings, in ivhich f Figure 1 isalongitudinal'sectional eleva- `tion. and

'Figure 2 is a transverse sectional vieiv ,partly broken awayon't'heline 2 2 of Figure '1 l'ookingin thediiection oit the arrows.

'Referring to Athe drawings only 'so much oi" afhoist is illustrateldasWillserve'to make `'the invention clear and'it is tobe understood motoror an electric motorl may be used and the hoist may be operated with orWithout an automatic brake.

The motor comprises the case A having the case cover B secured theretoas by means ot the capv screws C Which also hold the parts against thehoist. housing D.

The rotary driving member of the motor consists of a plurality ofrigidly connected angularly disposed cylinders, of Which only onecylinder E is shown in the drawings tor purposes oic illustration, therebeing in tactY three cylinders constructed as integral parts of asuitable Cylinder casing H Which connects and braces theV cylinders.

The cylinder casing H is mounted to rotate about the hollow stationaryshaft L 'which slots suitably supportedin the case A at one side of thecase, and .extending into a rotary sleevel or bushingO keyed and.suitably connected to rotate a driven member, such 'the motor shaft "Pextending through the case coverBY and throughthe hoist housing 'Dand'supported in afbearingFin tlie'gear case B.

.Tlie'wallsot each cylinder, lindicated geni l'ei-ally, by the referencecharacter are preferably .slotted .longitudinally at opposite sides atth'eirfouter portions forja 'portion to the cylinder casing 'H to rotatetherewith,

of their ilength, 'as .indicated A,at i Q, through y extend 'the Wristlpins Rot the pistons lS, and spacing sleeves T are preferably providedover the VWrist pins. Stationary'eccentrics U 'and Vare mounted at eachsideo''the cylinder casing H inany and in ,this instance lthe eccentric`U' vis preferably formed 'as a part of' the stationary shaftv L, theshatt'and Aeccentric being held' roni'rotation kais by means ci" the pinlV. The .eccentric V is `conveniently held tothe case 'coverB asby meanstot the pin X-,land the sleeve O and motor shaft 'PA rotatewithiii theeccentric'VWhi'ch Vforms'a.-bearing forthe sleeve. Applurulity of(yokesa, Zi'fand @and Zfe revolubly zmounted side by sideon theeccentricsU and V respectively, and ball bearings g consisting oi cages and balls,as shown, 'are preferably interposed between 'the yokes and theeccentrics.k The yokes are assumed to be connected in pairs to the pro-Jeeting ends of the Wrist pins R, as shown and described inthe aforesaidPatent No.

and 'f "are 1,484,960. The intermediate yokes .7i and e forming one pairare adapted to be connected to the Wrist pin R ot the. cylinder E shownin the drawing, and the other pairs oi yokes are Connected to the vWristpins of the other cylinders, not shown, it being understood that rthereare twice as many yokes as cylinders.

Suitable ine-ans are provided for supplying` and distributing motivefluid to the eyriiiders, and as shown pressure Huid, as oompressed air,may be supplied and exhausted through the hollow stationary shaft Ltroni the supply connect-ion Y.

A suitable throttle valve Z is provided for controlling' the su 3 ilv offluid from the su i. TTi r ply connection r and for reversingtliernotor. The drum L having the rope or cable j is suitably keyed tothe drum shaft 7c formed as the hub or tubular extension ot the`internal gear 0 rotatable Within the outer flange. portion p ot thehoist housing torming a part o'i the gear case, so that the drum rotatesabout the motor shaft l). A driving pinion g is carrie-d by the motorshaft l.D and a trame fr carrying double planetary or intermediate gearss is rotatably mounted Within the case wholly upon an extension t thecrurn shaft vEach intermediate or planetary gear s is formed with tivoportions a and 'v having different numbers or teeth and a stationaryinternal gear fw is conveniently formed as-an integral part oi:v thegear case B.

The planetary gears s are carried on pins fc rotating in ball bearingsin the interme diate gear frame r and in or ler that this planetary'gearing may act as a reduction gear, the. internal gears w and o areprovided with different numbers ot teeth. In the present instance, letit be assumed that the driving pinion Q has twelve teeth for eX- ampleand that the 'portion a of each planetary gear s has twenty-seven teethof the same pitch as the pitch ot the teeth on the driving pinion, Whilethe. portions o ot the planetary gears have twenty-four teeth like Wiseof the same pitch. The stationary internal gear 'w may be assumed tohave sixtysixteeth While the rotatable internal gear 0 has sixty-threeteeth all of the same pitch. In consequence of this construction, as theplanetar 1 gears s are rotatively driven around the inside. oit thestationary internal gear fw by the driving pinion g carrying With themtheintermediate gear 'frame r, the rotatable internal gear 0 willv bedriven at an angular velocity depending upon the dierence between thenumbers of teeth on the two internal gears.

ln assembling the epicyclic reduction gearing, the construction is suchthat the rotatable internal gear o may be rotated relativelyI to thestationary internal gear w to a given point at .which one tooth on eachinternal gear Will coincide as indicated at the point y for instance onFigure 3 and on each double planetary gear s there is one point at whichthe cutting otl the teeth on the tivo portions ont the gears iscommenced so that two spaces come inline permitting the planetary gearsto be assembled properly with the internal gears.

ln a hoist, the combination ot a drum housing having an outer tiangeportion Jroi-ming part ot a gear box, a motor shaft passng through thehousing vand having a driving pinion at its outer end, an internal gearinside the said iange portion of the housing and having a tubular hubjournaled on the motor shaitt and 'forming the drum shatt, a drinnrotatable With said tubular hub, an extension on the hub forming abearing, an intermediate 'rame rotatably mounted wholly upon saidextension or the hub, double planetary gears carried by said frame, anda gear case'having an internal gear secured to the outer Flange portionof the housing, the ditlerent aortions ot the planetary gears havingditlerent numbers ot teeth niesliing with the said internal gearsrespectively.

In testimony whereof We have signed this specification.

FRANCS A. .HMERSQNJ @AID H. PECK.

